US3886775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die for manufacturing rods or wire of compounds material with non-round cross-section
Assignee: ABB Norden Holding AB
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Filing: 1974-03-21
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Granted: 1975-06-03
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Expires: 1994-03-21
Abstract
Abstract A die for manufacturing rods of rectangular cross-section from a core of aluminium or an aluminium alloy and a casing of copper or a copper alloy by hydrostatic extrusion of a compound billet of such materials has a cup-shaped bottom which may be spherical, ellipsoidal, hyperbolic or parabolic in cross-section and a conical upper part. The bottom parts of the generatrices in axial section through the die form an angle which is between 120* and 180*, preferably between 150* and 170*, and a conical upper part has a cone angle between 40* and 120*.
Inventors
- 👤 Torsten Korsell
- 👤 Hans Larker
- 👤 Erik Lundblad
- 👤 Jan Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/02; B21C23/00; B21C23/007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
DIE FOR MANUFACTURING RODS WITH A CORE OF ALUMINUM OR AN ALUMINUM ALLOYS AND A CASING OF COPPER OR A COPPER ALLOY BY HYDROSTATIC EXTRUSION OF A COMPOUND BILLET HAVING AN INLET PORTION HAVING AN OUTER PART AND A CUP-SHAPED BOTTOM PART AND A DIE OPENING IN THE BOTTOM PART HAVING LONGER AND SHORTER SIDES, THE TANGENTS TO THE GENERATRICES TO THE BOTTOM PART FORMING A CONTINUOSULY INCREASING ANGLE FROM THE OUTER PART TO THE DIE OPENING, THE TANGENTS TO THE BOTTOM PART OF THE GENERATRICES IN AXIAL SECTION THROUGH THE DIE PERPENDICULAR TO THE LONGEST SIDE OF THE DIE OPENING, FORMING AN ANGLE (2A) WHICH IS BETWEEN 120* AND 180*, THE OUTER PART OF THE DIE BEING A CONICAL PART WHICH MERGES INTO THE CUP-SHAPED BOTTOM PART.
Claim 2
Dependent Claim
128 words
DIE FOR MANUFACTURING RODS WITH A CORE OF ALUMINUM OR AN ALUMINUM ALLOYS AND A CASING OF COPPER OR A COPPER ALLOY BY HYDROSTATIC EXTRUSION OF A COMPOUND BILLET HAVING AN INLET PORTION HAVING AN OUTER PART AND A CUP-SHAPED BOTTOM PART AND A DIE OPENING IN THE BOTTOM PART HAVING LONGER AND SHORTER SIDES, THE TANGENTS TO THE GENERATRICES TO THE BOTTOM PART FORMING A CONTINUOSULY INCREASING ANGLE FROM THE OUTER PART TO THE DIE OPENING, THE TANGENTS TO THE BOTTOM PART OF THE GENERATRICES IN AXIAL SECTION THROUGH THE DIE PERPENDICULAR TO THE LONGEST SIDE OF THE DIE OPENING, FORMING AN ANGLE (2A) WHICH IS BETWEEN 120* AND 180*, THE OUTER PART OF THE DIE BEING A CONICAL PART WHICH MERGES INTO THE CUP-SHAPED BOTTOM PART.
Claim 3
Dependent Claim
130 words
Die for manufacturing rods with a core of aluminium or an aluminium alloys and a casing of copper or a copper alloy by hydrostatic extrusion of a compound billet having an inlet portion having an outer part and a cup-shaped bottom part and a die opening in the bottom part having longer and shorter sides, the tangents to the generatrices to the bottom part forming a continuously increasing angle from the outer part to the die opening, the tangents to the bottom part of the generatrices in axial section through the die perpendicular to the longest side of the die opening, forming an angle (2 Alpha ) which is between 120* and 180*, the outer part of the die being a conical part which merges into the cup-shaped bottom part.
Claim 4
Dependent Claim
130 words
Die for manufacturing rods with a core of aluminium or an aluminium alloys and a casing of copper or a copper alloy by hydrostatic extrusion of a compound billet having an inlet portion having an outer part and a cup-shaped bottom part and a die opening in the bottom part having longer and shorter sides, the tangents to the generatrices to the bottom part forming a continuously increasing angle from the outer part to the die opening, the tangents to the bottom part of the generatrices in axial section through the die perpendicular to the longest side of the die opening, forming an angle (2 Alpha ) which is between 120* and 180*, the outer part of the die being a conical part which merges into the cup-shaped bottom part.
Claim 5
Dependent Claim
15 words
Die according to claim 1, in which (2 Alpha ) is between 150* and 170*.
Claim 6
Dependent Claim
42 words
Die according to claim 1, in which the tangents to the bottom parts of the generatrices in axial section through the die perpendicular to shorter sides of the die opening form an angle (2 Alpha ) which is between 120* and 180*.
Claim 7
Dependent Claim
15 words
Die according to claim 3, in which (2 Alpha ) is between 150* and 170*.
Claim 8
Dependent Claim
24 words
Die according to claim 1, in which the cup-shaped bottom part of the die has the shape formed by revolution of a conic section.
Claim 9
Dependent Claim
22 words
Die according to claim 1, in which the outer conical part has a cone angle (2 Beta ) between 40* and 120*.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |